Pith Number

pith:UBBZ45KS

pith:2009:UBBZ45KSDUQTKEYD5YDBG2YNUN

not attested not anchored not stored refs pending

A family of inversion formulas in Thermoacoustic Tomography

Linh V. Nguyen (Department of Mathematics, Texas A & M University)

arxiv:0902.2579 v2 · 2009-02-15 · math.AP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UBBZ45KSDUQTKEYD5YDBG2YNUN}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

1 paper in Pith

Learned backprojection for sparse and limited view photoacoustic tomography

Receipt and verification

First computed	2026-07-04T15:39:02.838961Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0439e75521d21351303ee06136b0da374f10c678ff3abbb23df032e598277af

Aliases

arxiv: 0902.2579 · arxiv_version: 0902.2579v2 · doi: 10.48550/arxiv.0902.2579 · pith_short_12: UBBZ45KSDUQT · pith_short_16: UBBZ45KSDUQTKEYD · pith_short_8: UBBZ45KS

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UBBZ45KSDUQTKEYD5YDBG2YNUN \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a0439e75521d21351303ee06136b0da374f10c678ff3abbb23df032e598277af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73da62c3ea8d5a8465316dbf5878c73624d989a1d47217ba02882678a437d255",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2009-02-15T22:29:33Z",
    "title_canon_sha256": "1c169a1550416e8dfed30faafffa05b08d30ebded66ac59bcc06d955334dd32b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.2579",
    "kind": "arxiv",
    "version": 2
  }
}